Ariston Boiler Fault & Common Errors

Has a fault code appeared on your Ariston boiler? Despite being well known for their reliability, on occasions something can go wrong.

If you are unsure what the error code could mean we've compiled a table of Ariston boilers fault codes and the potential cause to help you understand what the issue may be. If you are unsure on how to fix it, our expert boiler engineer partners can help you find a solution with expert advice, simply fill out the form above and they'll get back to you.

General Faults & Errors

This section is an overview of all of the types of errors that can occur on a Ariston boilers.

Fault CodePotential CauseRelates To
101OverheatingCentral Heating Circuit
102Error with pressure sensorCentral Heating Circuit
103Circulation insufficientCentral Heating Circuit
104Circulation insufficientCentral Heating Circuit
105Circulation insufficientCentral Heating Circuit
106Circulation insufficientCentral Heating Circuit
107Circulation insufficientCentral Heating Circuit
108Water insufficientCentral Heating Circuit
110C.H. Flow temp. probe circuit open / short circuitCentral Heating Circuit
112C.H. Return temp. probe circuit open / short circuitCentral Heating Circuit
114External sensor circuit open / short circuitCentral Heating Circuit
116Floor thermostat contact openCentral Heating Circuit
118Heating delivery probe problemCentral Heating Circuit
1pt1Indication circulation insufficientCentral Heating Circuit
1pt2Indication circulation insufficientCentral Heating Circuit
1pt3Indication circulation insufficientCentral Heating Circuit
2022 Bottom storage temperature probe circuit issueDHW Circuit
204Solar collector temperature probe circuit issueDHW Circuit
207Overheating solar collectorDHW Circuit
208Collector frost protection temperatureDHW Circuit
301EEPROM errorPCB
302Communication errorPCB
303Main PCB errorPCB
304Reset too frequentlyPCB
305Main PCB errorPCB
306Main PCB errorPCB
307Main PCB errorPCB
4077 room sensor circuit issuePCB
501Flame not detectedIgnition
502Gas valve closed but flame detectedIgnition
504Flame liftIgnition
5P11st ignition failedIgnition
5P22nd ignition failedIgnition
5P3Flame cut-offIgnition
604Fan speed insufficientIgnition
610Open thermofuseIgnition
701Outgoing sensor defective in zone 2Multi Zone Heating
702Return sensor defective in zone 2Multi Zone Heating
703Outgoing sensor defective in zone 3Multi Zone Heating
704Return sensor defective in zone 3Multi Zone Heating
705Hydraulic separation sensor defectiveMulti Zone Heating
706Overheating in zone 2Multi Zone Heating
707Overheating in zone 3Multi Zone Heating